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Advocard [28]
2 years ago
6

The math score for ten of Mrs. Moore's students are shown below. How many students made a score of more than 69 but less than 90

?
​

Mathematics
1 answer:
TEA [102]2 years ago
3 0

Answer:

8

Step-by-step explanation:

first, 70-79 have 3 students

then 80-89 have 5 students

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An appliance repair shop charges $80 for the first hour of labor and $65 for each additional hour. The total labor charge for an
VikaD [51]

Answer:

C. 80+65x=665

The total repair time is 9 hours.

Step-by-step explanation:

The first hour is $80, no matter what. That is the first part of your equation.

x = the number of hours minus 1.

It would be -1 because it is $65 per ADDITIONAL hours, after the first hour.

So that would be 65x, because you don't know the number of hours it took (yet), but you know that it would be $65 per extra hour.

So you have your equation: 80+65x=665

1. Get rid of subtraction/addition.

You want to get rid of the number from both sides. It's subtracting 80 and not adding 80 because the 80 is positive, and you want to cancel out that 80.

80+65x=665

-80           -80

You are left with 65x=585

2. Get rid of multiplying/dividing.

Here, we want to get the variable by itself, so we will have to divide the 65x by 65. You want to do the opposite operation to cancel the 65 out.

65x=585

65x/65 = 585/65

You are left with x = 9

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Step-by-step explanation:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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